Electrochimica Acta最新文献_第9页

Composite heterostructured Co3O4@CeO2 hollow nanospheres as an effective cathode catalyst for lithium-O2 battery 复合异质结构Co3O4@CeO2空心纳米球作为锂- o2电池的有效阴极催化剂

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148386

Pengfa Li , Jie Yang , Xiaoguang Li , Cunjing Wang , Zhihua Ma , Quanzhou Du , Jiao Guo , Xiaowei Guo , Liujie Wang

{"title":"Composite heterostructured Co3O4@CeO2 hollow nanospheres as an effective cathode catalyst for lithium-O2 battery","authors":"Pengfa Li , Jie Yang , Xiaoguang Li , Cunjing Wang , Zhihua Ma , Quanzhou Du , Jiao Guo , Xiaowei Guo , Liujie Wang","doi":"10.1016/j.electacta.2026.148386","DOIUrl":"10.1016/j.electacta.2026.148386","url":null,"abstract":"<div><div>Lithium-O<sub>2</sub> batteries (LOBs) are considered potential energy storage systems, given their very high theoretical energy density. Nevertheless, the sluggish kinetics of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) may lead to elevated overpotentials and diminished cycle stability. In this research, composite heterostructured Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> hollow nanospheres (Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> HNs) were prepared using a convenient hydrothermal approach, and then subjected to an annealing step, which exhibited good performance as a bi-functional catalyst for LOBs. The heterostructured hollow nanospheres provided an extensive catalytic surface to facilitate reaction kinetics. In addition, benefitting from the interfacial electron rearrangement of Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> heterostructure, the synergistic interaction can be contributed to ameliorate the chemisorption of intermediates and decrease the discharge and charge overpotentials, as validated-by density functional theory (DFT) calculations and experimental tests. Consequently, the assembled LOBs exhibited a narrow voltage gap (1.02 V at a middle capacity of 500 mAh g<sup>-1</sup>), an enhanced discharge capacity of 8988.8 mAh g<sup>-1</sup>, and cycling stability over 50 cycles at a controlled capacity of 500 mAh g<sup>-1</sup>. Notably, the Co<sub>3</sub>O<sub>4</sub>@CeO<sub>2</sub> HNs exhibited superior electrocatalytic activity than the individual Co<sub>3</sub>O<sub>4</sub> nanospheres (Co<sub>3</sub>O<sub>4</sub> Ns) and CeO<sub>2</sub> nanospheres (CeO<sub>2</sub> Ns). Overall, this work presents an innovative methodology for designing heterojunctions to improve the electrocatalytic performance of LOBs.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148386"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A conductive metal-organic framework-modified electrode for sensitive electrochemiluminescent detection of cardiac Troponin I 导电金属-有机框架修饰电极电化学发光检测心肌肌钙蛋白I

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-01 DOI: 10.1016/j.electacta.2026.148350

Alenzo Murray , Giovanni Valenti , Priscilla Baker

{"title":"A conductive metal-organic framework-modified electrode for sensitive electrochemiluminescent detection of cardiac Troponin I","authors":"Alenzo Murray , Giovanni Valenti , Priscilla Baker","doi":"10.1016/j.electacta.2026.148350","DOIUrl":"10.1016/j.electacta.2026.148350","url":null,"abstract":"<div><div>The design of a sensitive and accurate electrochemiluminescence (ECL) immunosensor for the early detection of cardiac biomarkers at low concentrations is essential to improve patient outcomes. In this study, a conductive metal-organic framework (c-MOF), Cu<sub>3</sub>(HHTP)<sub>2</sub>, was drop-coated onto a screen-printed carbon electrode (SPCE) to produce an ultra-efficient electrochemical sensing platform which was subsequently functionalized with cTnI antibodies (Ab) and bovine serum albumin (BSA) for selective detection of the cardiac Troponin I. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) confirmed the successful stepwise fabrication of the immunosensor. We investigated the ECL behaviour of the Cu<sub>3</sub>(HHTP)<sub>2</sub>-modified SPCE using [Ru(bpy)<sub>3</sub>]<sup>2+</sup> as the luminophore and found that a significant increase in ECL intensity was achieved compared to that of the unmodified SPCE. This enhancement was attributed to the high conductivity, porous structure, the increased surface area of the c-MOF and crucially the HHTP ligand plays a critical role in enabling ECL generation in this system. The analytical performance of the immunosensor was evaluated by monitoring the ECL responses at varying cTnI concentrations. The immunosensor achieved a detection limit of 10.23 ± 1.06 pg/mL in vitro, well below the clinically relevant cTnI thresholds, highlighting its potential for rapid and early-stage cardiac biomarker detection. These findings suggest the Cu<sub>3</sub>(HHTP)<sub>2</sub>-based ECL immunosensor represents a viable sensing platform that significantly increases conductivity and ECL efficiency without the need of additional co-reactant species.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148350"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fe3O4 nano-octahedra/Vulcan XC72: Optimization and combination with solar-based electro-fenton for progestins degradation Fe3O4纳米八面体/Vulcan XC72：优化和结合太阳能电fenton降解孕激素

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148426

Juliana M.S. de Jesus, Caroline de O. Carrilho, João P.C. Moura, Aline B. Trench, Caroline C. Augusto, Bruno L. Batista, Mauro C. dos Santos

{"title":"Fe3O4 nano-octahedra/Vulcan XC72: Optimization and combination with solar-based electro-fenton for progestins degradation","authors":"Juliana M.S. de Jesus, Caroline de O. Carrilho, João P.C. Moura, Aline B. Trench, Caroline C. Augusto, Bruno L. Batista, Mauro C. dos Santos","doi":"10.1016/j.electacta.2026.148426","DOIUrl":"10.1016/j.electacta.2026.148426","url":null,"abstract":"<div><div>The widespread presence of synthetic progestins, such as levonorgestrel (LNG) and gestodene (GES), in aquatic environments poses significant ecotoxicological risks due to their endocrine-disrupting properties. In this study, nano-octahedral magnetite (Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO) was synthesized via a hydrothermal route and incorporated into gas diffusion electrodes (GDEs) supported on Vulcan XC72 to enhance the <em>in-situ</em> electrogeneration of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). High-resolution Transmission Electron Microscopy, X-ray diffraction, SEM, X-ray photoelectron spectroscopy, and contact angle measurements thoroughly characterized the physicochemical and morphological properties of the materials. 3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C provided a 2-fold increase on H<sub>2</sub>O<sub>2</sub> selectivity in comparison with Vulcan XC72. Electrochemical performance was optimized using a 2<sup>3</sup> factorial design and principal component analysis (PCA), with current density, pH, and Na<sub>2</sub>SO<sub>4</sub> concentration as variables. The optimized GDE (3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C) achieved a maximum H<sub>2</sub>O<sub>2</sub> production of 0.44 ± 0.02 g L⁻¹ with a current efficiency of 43.1 ± 0.23 % and a specific energy consumption of 0.012 ± 0.009 kWh g⁻¹. The electrode was further applied to the degradation of LNG and GES using solar and anodic-assisted electro-Fenton processes. Under optimal conditions, over 70 % removal of both progestins was achieved, with stable performance across three operational cycles. These findings demonstrate the potential of 3 % Fe<sub>3</sub>O<sub>4</sub><sub><img></sub>NO/C-GDEs as efficient, reusable cathodes for sustainable electrochemical advanced oxidation processes (EAOPs) in water treatment.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148426"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Homogenization-induced improvements in mechanical and corrosion properties of Mg-12.31Li-5.62Al-0.14Y alloy 均匀化诱导Mg-12.31Li-5.62Al-0.14Y合金力学和腐蚀性能的改善

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-20 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148410

Jiahao Sun , Xu Wang , Yang Li , Jinping Yuan , Yun Zou

{"title":"Homogenization-induced improvements in mechanical and corrosion properties of Mg-12.31Li-5.62Al-0.14Y alloy","authors":"Jiahao Sun , Xu Wang , Yang Li , Jinping Yuan , Yun Zou","doi":"10.1016/j.electacta.2026.148410","DOIUrl":"10.1016/j.electacta.2026.148410","url":null,"abstract":"<div><div>The effects of homogenization treatment on the mechanical properties and corrosion behavior of an LA126 (Mg-12.31Li-5.62Al-0.14Y, wt.%) alloy were systematically investigated. The as-cast alloy was homogenized at 250 and 400°C for 1, 4, and 7 h, and its mechanical properties and corrosion behavior in 3.5 wt.% NaCl solution were evaluated. Homogenization at 400°C increased strength but reduced ductility, a trade-off primarily attributed to the precipitation of MgLiAl₂ within the β-Li matrix. While this intermetallic phase contributes to strengthening, its coarser morphology tends to induce local stress concentration, thereby compromising plasticity. In contrast, treatment at 250°C enhanced ductility with only a slight reduction in strength, mainly by alleviating casting-induced elemental segregation. Notably, the specimen homogenized at 400°C for 7 h exhibited superior corrosion resistance, characterized by a more noble corrosion potential (-1.571 V), a lower corrosion current density (5.11 × 10⁻⁵ A·cm⁻²), and the lowest mass-loss rate (0.67 mg·cm⁻²·d⁻¹). This enhancement is ascribed to the dissolution of anodic AlLi phases and improved microstructural uniformity, which effectively suppresses micro-galvanic coupling and localized corrosion.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"556 ","pages":"Article 148410"},"PeriodicalIF":5.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical behavior of Sc (III) and preparation of Al-Sc alloys in NaF-AlF3-BaF2 by a floating molten aluminum cathode Sc （III）的电化学行为及其在NaF-AlF3-BaF2中制备Al-Sc合金

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-01-20 DOI: 10.1016/j.electacta.2026.148282

Daxue Fu , Jiuhua Wu , Chengyu Wang , Chunxin Wang , Qunzhao Xu , Jianshe Chen , Qing Han , Shuchen Sun

{"title":"Electrochemical behavior of Sc (III) and preparation of Al-Sc alloys in NaF-AlF3-BaF2 by a floating molten aluminum cathode","authors":"Daxue Fu , Jiuhua Wu , Chengyu Wang , Chunxin Wang , Qunzhao Xu , Jianshe Chen , Qing Han , Shuchen Sun","doi":"10.1016/j.electacta.2026.148282","DOIUrl":"10.1016/j.electacta.2026.148282","url":null,"abstract":"<div><div>Scandium is one of the key alloying elements for aluminum. This study presents an innovative upward-flow liquid aluminum cathode molten salt electrolysis method for producing composition stability Al-Sc alloys. A system NaF-AlF<sub>3</sub>-BaF<sub>2</sub> (molar ratio of NaF to AlF<sub>3</sub> = 2.2) containing 25 wt% BaF<sub>2</sub> was used as the electrolyte to achieve the floating molten aluminum cathode. The electrodeposition behavior of Sc at a tungsten cathode was analyzed in the electrolyte and experiments were carried out to produce Al-Sc alloys by the proposed process. The results show that the reduction of Sc (III) at 1273 K involved a one-step reaction with three-electron transfer. The process was limited by the diffusion of Sc (III) ions from the electrolyte to the electrode interface with a diffusion coefficient of 1.943 × 10<sup>–5</sup> cm<sup>2</sup>/s. SEM-EDS and XRD analyses revealed that the early electrolysis products contained Al<sub>3</sub>Sc phase and W-Sc enrichment zones, while the final cooled products exhibited Sc in the surrounding Al layer, which primarily precipitates via aluminothermic reduction. Spherical products with the maximum scandium content of 3.68 wt% were obtained under a current density of 1.0 A/cm<sup>2</sup> at 1273 K.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148282"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing Pt-decorated MoO2 catalysts for enhanced hydrogen evolution reaction in proton exchange membrane water electrolysis 设计用于质子交换膜电解中强化析氢反应的pt修饰MoO2催化剂

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-09 DOI: 10.1016/j.electacta.2026.148405

Jin Li , Jiaqi Zhu , Qianqian Tang , Heng Zhang

{"title":"Designing Pt-decorated MoO2 catalysts for enhanced hydrogen evolution reaction in proton exchange membrane water electrolysis","authors":"Jin Li , Jiaqi Zhu , Qianqian Tang , Heng Zhang","doi":"10.1016/j.electacta.2026.148405","DOIUrl":"10.1016/j.electacta.2026.148405","url":null,"abstract":"<div><div>To improve platinum (Pt) utilization and electrocatalytic performance, selecting a suitable support material is essential. In this study, Pt was successfully incorporated into a self-supported molybdenum dioxide (MoO<sub>2</sub>) framework via an electrodeposition technique, with the Pt content measuring around 0.56 wt %. The resulting catalyst exhibits an overpotential of 11.2 mV at a current density of −10 mA cm<sup>−2</sup> and remarkable durability that extends beyond 50 h. Moreover, the practical proton exchange membrane water electrolysis (PEMWE) system with this catalyst achieves a current density of 1 A cm<sup>−2</sup> at 1.75 V and operates stably for 100 h. Experimental findings verify that the improved performance of the catalyst is attributed to the strong interaction between Pt and MoO<sub>2</sub>, its distinctive nanosheet morphology, as well as the self-supporting characteristic of the electrode. This strategy provides an effective means for developing freestanding heterojunctions and promotes progress in the field of electrocatalytic hydrogen generation.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148405"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recursive RC Modeling for Time-Domain Estimation of the Distribution of Relaxation Times 时域估计松弛时间分布的递归RC模型

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-10 DOI: 10.1016/j.electacta.2026.148402

Marvin Malchau, Jan Philipp Schmidt

引用次数: 0

Real-time lithium plating detection in fast-charging Li-ion batteries via a hybrid impedance spectroscopy framework 基于混合阻抗光谱框架的快速充电锂离子电池镀锂实时检测

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-04 DOI: 10.1016/j.electacta.2026.148379

Yuan Li , Jing-Xuan Nie , Hua Li , Jing-yan Bai , Zhi-an Xue

{"title":"Real-time lithium plating detection in fast-charging Li-ion batteries via a hybrid impedance spectroscopy framework","authors":"Yuan Li , Jing-Xuan Nie , Hua Li , Jing-yan Bai , Zhi-an Xue","doi":"10.1016/j.electacta.2026.148379","DOIUrl":"10.1016/j.electacta.2026.148379","url":null,"abstract":"<div><div>Lithium plating poses a critical challenge for next-generation fast-charging lithium-ion batteries, particularly under low-temperature operations and aggressive charging protocols. The parasitic phenomenon not only accelerates capacity degradation but also triggers hazardous Li-dendrite propagation, creating an irreconcilable conflict between charging speed and battery safety. To address this long-standing detection challenge, we present a non-invasive impedance spectroscopy technique employing a hybrid excitation protocol that integrates square wave-current stimulation with dynamic voltage response analysis. The key feature lies in developing a Complex Morlet Wavelet Transform (CMWT)-based impedance calculation framework that achieves real-time phase-resolved decomposition of electrochemical signatures during active charging cycles. Through systematic electrochemical model interpretation and multi-physics validation, we reveal a characteristic frequency-domain signature: characteristic depression of impedance real-part magnitude at 0.5 Hz exhibits strong correlation with lithium plating onset. The robustness of this method has been validated through various operational experiments, demonstrating exceptional accuracy with an estimation error of less than 4 % compared to conventional impedance measurement system. Moreover, comparative studies with conventional voltage relaxation profile (VRP) methods demonstrate 98 % faster detection capability and 8 % improvement in early-stage identification accuracy. The work establishes a practical framework for battery health monitoring by bridging the gap between electrochemical dynamics and BMS implementation, providing critical insights for developing adaptive fast-charging strategies with inherent safety assurance.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148379"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phenothiazine derivative cathodes with tunable molecular structures for ultralong-life lithium batteries 超长寿命锂电池用分子结构可调吩噻嗪衍生物阴极

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-02-05 DOI: 10.1016/j.electacta.2026.148388

Junjie Li , Rui Li , Xiaoyan Feng , Chaoran Pi , Yanqing Wang , Yu Peng , Yun Zheng , Yingying Wang , Jingchao Chai , Zhihong Liu

{"title":"Phenothiazine derivative cathodes with tunable molecular structures for ultralong-life lithium batteries","authors":"Junjie Li , Rui Li , Xiaoyan Feng , Chaoran Pi , Yanqing Wang , Yu Peng , Yun Zheng , Yingying Wang , Jingchao Chai , Zhihong Liu","doi":"10.1016/j.electacta.2026.148388","DOIUrl":"10.1016/j.electacta.2026.148388","url":null,"abstract":"<div><div>Organic cathode materials represent promising candidates for lithium metal batteries, boasting advantages such as structural tunability, sustainability, and high theoretical capacity. Although phenothiazine (<strong>PTZ</strong>) has demonstrated excellent performance as a high-voltage p-type redox-active cathode, previous research has primarily focused on its polymeric forms, with the substituent effects in small molecules remaining underexplored. This work investigates three <strong>PTZ</strong> derivatives functionalized with different substituents to elucidate the structure-property relationship. Among them, the sulfonate-modified <strong>PTZ</strong> exhibits promising properties, including a high discharge plateau (3.5 V vs. Li/Li<sup>+</sup>), minimal dissolution in electrolytes, and ultralong cycling stability (78.3% capacity retention after 10,000 cycles at 3 A·g<sup>–1</sup>). This molecular engineering strategy provides key insights for designing durable organic cathodes for high-energy lithium metal batteries.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148388"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrocatalytic nitrogen fixation and coupling reactions of copper single-atom catalysts 铜单原子催化剂的电催化固氮及偶联反应

IF 5.6 3区材料科学

Electrochimica Acta Pub Date : 2026-04-10 Epub Date: 2026-01-29 DOI: 10.1016/j.electacta.2026.148340

Zhiya Han , Shuqi Wang , Miaosen Yang , Hua Shi , Na He , Jiayin Yang , Xiyang Liu , Yue Kang , Yixin Liu , Huiting Ni , Facai Wei , Sheng Han

{"title":"Electrocatalytic nitrogen fixation and coupling reactions of copper single-atom catalysts","authors":"Zhiya Han , Shuqi Wang , Miaosen Yang , Hua Shi , Na He , Jiayin Yang , Xiyang Liu , Yue Kang , Yixin Liu , Huiting Ni , Facai Wei , Sheng Han","doi":"10.1016/j.electacta.2026.148340","DOIUrl":"10.1016/j.electacta.2026.148340","url":null,"abstract":"<div><div>Ammonia synthesis via electrocatalytic nitrogen reduction reaction offers a sustainable alternative to the energy-intensive Haber-Bosch process. In this study, we fabricated covalent triazine-modified, carbon-loaded Cu single-atom materials (Cu SA/NSPC and Cu SA/NPC) as novel catalysts by pyrolyzing Cu single-atom-containing polymers to address current limitations. It is characterized by the introduction of S prompting electron migration to the metal active site, inhibiting side reactions and reducing energy consumption, while lowering bond energies, promoting nitrogen activation and intermediate formation, and increasing the reaction rate, and the formation of coordination structures between Cu single-atom and covalent triazine carriers, providing new NRR active sites to further enhance the activation and reduction of nitrogen molecules. Our results show that Cu SA/NSPC achieves an ammonia yield of 66.87 ± 2.13 µg h<sup>-1</sup> mg<sub>cat</sub><sup>-1</sup> and a Faraday efficiency of 33.2 ± 1.4 %. In the flow cell, the ammonia yield is further improved to reach 242 ± 2.43 µg h<sup>-1</sup> mg<sub>cat</sub><sup>-1</sup>. In-situ Raman and density functional theory (DFT) calculations helped to understand the intrinsic mechanism of the reaction, and stability and flow cell tests showed excellent durability. By coupling with the ethylene glycol oxidation reaction, it provides a new idea for efficient electroconversion of biomass resources and coupling with renewable energy. This study realizes the innovative fusion of single-atom catalysis and organic framework materials, which opens up a new direction for the development of high-performance electrocatalysts for energy and environment.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"555 ","pages":"Article 148340"},"PeriodicalIF":5.6,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0